function drawCicle(online, sum) {
	var end = online / sum * 2 - 0.5;
	var progress = -0.5;
	var c = document.getElementById("myCanvas");
	var ctx = c.getContext("2d");
	ctx.lineWidth = 10;
	ctx.strokeStyle = '#5B85B3';

	var draw = setInterval(function() {
			ctx.beginPath();
			ctx.arc(85, 85, 70, progress * Math.PI, (progress + 0.03) * Math.PI);
			ctx.stroke();
			progress += 0.025
			if(progress >= end) clearInterval(draw)
		}, 20)
		//设置在线数
	ctx.font = "65px Arial";
	ctx.fillStyle = "#FFF";
	var x = 70;
	if(online > 9) x = 50;
	if(online > 99) x = 30;
	ctx.fillText(online, x, 95)
}